In a new threat to Google’s ad dominance, AI search startup Perplexity is in talks with major brands on a new advertising model for sponsored questions. We spoke with the CEO of AI search optimization startup Profound on why it represents a new pillar in marketing: AI visibility. Plus, Sam Altman could be on his way to becoming the biggest power player in Silicon Valley, with new reporting giving a glimpse into the web of tech titans he’s now tied to.